Keg-making machine



F S, YOUTSEY; E. C. WALKER AND A. S. MOS ES. KEG MAKING MACHINE.

APPLICATION FILED MAR. 22, 1916. 1,371,833, Patepted Mar. 15, 1921 TSHEEIS-SHEET I.

F. S. YOUTSEY, E. C. WALKER AND AQS. MOSES. KEG MAKING MACHINE.

- 1 APPLICATION FILED MAR. 22, 1916. 1,371,833. Patented Mar. 154921..

J SHEEISSHEET 2.

6 z amen/lbw:

lZayo 5. 701/755;

y [mm/P06. h .unsR, a fls/la 5/611 6. #0555 ew m.

F. S. YOUTSEY, E. C. WALKER AND A. S. MOSES. KEGMAKING MACHINE.

APPLICATION FILED MAR. 22, I916. 1,3?1,833. Patented Mar.15,1921

7 SHEETS-SHEEI 3.

y) 1 i ems r 0 UM .vwwa. L. f v... 6mm H. VA .1 Z: F s "Mn E Q 5 F. s. voursgv, E. c. WALKER AND A. s. MOSES.

KEG MAKING MACHINE. APPLICATION FILED MAR. 22, I916.

Patented Mar. 15, 1921.

7 SHEETSSHEEI 4.

IIIIIIIIIIIIIIII 62 flora 6. Mar-55y,

F. S. YOUTSEY, E. C. WALKER AND A. S. MOSES. KEG MAKING MACHINE.

APPLICATION FILED MAR. 22. 1916. 1,371,833. Patented Mar. 15,1921.

7 SHE-ETS-SHEET 5.

F. S. YO UTSEY, E. C. WALKER AND A. S. MOSES.

KEG MAKING MACHINE.

APPLICATION FILED MAR. 22.,1916-' Mar 15,

7 SHEETSSHEE 1 a.

F. S. YOUTSEY, E. C. WALKER AND A. S. MOSES.

KE MAKING MACHINE.

APPLICATION men MAR 22. 1916.

Patented al-Q 15, 1921.

ISHEETS-SHEEI 7.

UNITED STATESFPVATENT OFFICE.

FLOYD s. YOUTSEY AND EDWARD CJW'ALKER, or 's'r; LOUIS, MissouRi,*A- ND ASHE LEIGH s. MOSES OF NEW YORK, iv. 51., ASSIGNORS To NATIONAL OF ST. LOUIS, MISSOURI, A CORPORATION or NEW-JERSEY."

LEAD COMPANY,

KEG-MAKING MACEIIQ'EF Application filed March 22,1916; Serial. No. 85,795.

T 0 all whomit m ag concern:

Be it known that we, FLOYD S. Yoii'rsnY, EDWARD C. l/VA RRR, and Asii innicii S; Mosns,.all citizens of the United States, and said FLOYD S. YOUTSEY and EDWARD C. WALKER residing at St. Louis, in the State of Missouri, and said ASHELRIGH S. Mosiis residing at New York, State of New York, have invented a certain new and useful Improvement in Keg-Making Machines, of which the following is a specification.

This invention relates to machines for forming sheets into tubular structures, Such as kegs, and more particularly, to means and methods of welding.

- One of the objects of this invention is to provide a machine. which will form a sheet so as toocause its ends to abut and then weld the abutting ends to form a butt weld.

Another object is to provide a machine of this type which will "not only form and secure the ends of a sheet, but also strip or eject. the formed sheet fromthe machine.

Another object is to provide .a machine tail description taken in connection with the accompanying drawings, in which:

Figure l is .a front elevation of a machine embodying this invention;

" Fig. 2 is a plan; Y

Fig.7 3. is a side elevation; Fig. 1 is a sectionon the line 4+1, Fig. 2, the mandrel being shown in elevation and the welding torch and bracket be ng omitted; Y r I Fig. 5 is a section on the line 55, Fig. 2; Fig. 6 is an enlarged section of the welding torch and its standard, taken on the line 4- 1, Fig. V k H Fig. 7 is a section on the line (-1, Fig. 6; Fig. 8 is a section on the line 8-8, Fig. 2; but showing the formers down;

' Fig. 9 is a plan of the controller, part of the casing of which is'cut' away to showa controlling valve and cam;

12-12, Fig. 11;

Fig.10 is a F .9-;. a

Fig- 11-1S an enlarged section on the line 111 w .Fig. 12 is an enlarged section on the line 'Fig. is a. diagram showing the electrical connections between the controller and the machine; '7

Fig 14 is an enlarged detail of a part. of the controlling mechanism; Q

Fig. 15 is a diagram showing the sequence --'-Patented Mania 192 1.

Sa an 0;. the line 10-10,

of operation of the different elements ofthe machine Fig. 16 is a view siinilar' to 6, but 7 showing another embodiment of this inven- 1310115, and, I

Fig. 17 is a view similarto Fig. 8, but

showing another embodiment of this inven- 5 I v tion.

Referring to. the accompanying drawings, 1 designates a base having mounted thereon standards 2 and The standard 3 has mounted thereon a bracket 4 carrying the mandrel; 'This mandrel compr ses a 'cen tral part or base 5, fixed to the bracket, and wings 6 pivoted at their lower ends, at 7, to the base; The upperfends of the wings have connected thereto eeccentric straps 8 engaging oppositely arranged eccentrics 9 fixed to a shaft 10' having a bearing in the base 5, and provided with a sprocket 11 positioned in'the' bracket 4. A chain 12 engages the sprocket 11 and passesbvcr a sprocket 13 mountedonastub shaft in the standard 8'. The chain 12'is connected by a bolt 14 with across head 15 working in guides won the standard 3, and connected with the piston rod 17 of a piston working in the cylinder 18-, mounte'd on the base 1.

With this construction reci rocation of the piston will cause an outward and inward movement ofthe wings 6 to expand and contract the mandrel, as shown in Figs. 5and we SreSpecti ely.

support 26- connecting the, standards'Q and 31 of .a piston working in a cylinder 82 Spotters 25 move vertically in abridge or' '3', and thesejspotters are formed on links 27 mounted in a standard 2. Movement of the piston in the'cylinder will thespotters 25 toward and from the mandrel, so as to clamp the sheet S against. the mandrel.

connected, at their outer ends, to the ends Arms or carriers, 35 are pivoted at 36 be: tween the standards 2 and 3, and these arms carry former jaws 37 pivoted at 4:6 to the arms 35, and at 47 to and flexibly supported by links 38 in turn pivoted at 39 to the pistonrod lQ of a piston working in a cylinder 42 mounted on the base 1. Chains 43 are connected, at their inner ends, with the bridge 26 by means of eye bolts 44, and are 45 of the jaws '37, which ends are curved and beveled, so as to conform to the man drel. The links 38 are connected by a strong spring 48, which tends to move the 5Qinthebracket50. The cross-head 51 is lower endsof the jaws 37 toward each other, so as to separate these jawsat their upper ends. Reciprocation of the piston will cause the jaws to move up and down and toward and from eachother, as shownin Fi gs. 1 and so as to wrap the sheet S around ,the mandrel. f 1 V A skeleton bracket 50 is mountedlon the bracket 4., and this bracket has mounted therein across head 51 working in guides fixed to the endof a piston rod 53 having a connected piston workingin a cylinder 54: mounted on the bracket 50. The cross 4 head 51 has mounted thereon a welding tool 55 ofany suitable construction, this welding toollbeing preferably of the oily-acetylene type, and mixture being conducted thereto by means of atubing 56. This tool is simply illustratedain a general way, and no attempt has. been made to show it in detail, since it may be of any well kn'own'type.

The tube is provided with a suitablereguaplate 61 slidable on the side member of the bracket, and arranged to be clamped in adjusted position by screws .62 working in grooves 63. Beciprocation ofthepistonwill move the tool back and forth along the man} drel, and the cam groove 59, will so adi just the flowof gases to the tip as to cause this flow, and, therefore, the flame, to be reduced at the ends of the stroke of the tool, which ends of the stroke correspond to the end of the sheet S. The purpose ofthis construction will be more fully hereinafter described.

Rods project through andhrdghided byholes in the bracket 4:, and are arranged,

around themandrel. These'rods are connected with a cross head/Zlmounted on a piston rod 7 2 of a piston working in a cylinder 74 mountedon the bracket 4:. This forms a stripper device which operates to strip the formed keg or receptacle from the mandrel, this being accomplished by forward movement of the piston and theconnected rods 70. j

Referring now more particularly to Figs. 9 to 15 inclusive, 8O designates a base which has mounted thereon covers 77 and T8, the latter of which forms a valve easing into which any suitable motive fluid, such as water, oil, or compressed air, is led'by a pipe 79. The base 80 has also formed thereon a casing 81 sub-divided into a series of pockets or chambers 83 and 84,Ithe1sub-dividing partitions running crosswise of the casing, and there being in this case fiveseparate pairs of inlet chambers 83 and Sea Each pair of chambers has a pair of pipes 82 and 85 leading to opposite ends'of itscorresponding cylinder. A common exhaust chamber 86 extends alongthe casing. Six

separate valves 87 control the inlet and 'exhaust to thechambers 8'3 and 84, and each of these valves has a valve rod 88' provided with cam rolls 89 and 90 ona yoke 91', the end of this yoke beingguided in ways'92 on the base 80. The cam rolls 89 and 90 respect to the shaft. Tlieshaft 95 has mounted thereon a gear. 96, with which meshes a p1n1on 97' loosely mounted on the shaft of an electric motor 98. The pinion is clutched to and from the motor shaft by a clutch '99 controlled by an electromagnet 100. With this constructionyrota tion ofthe shaft 95. will operate the valves 87, and each valve will c ontrolits corresponding cylinder, so as to alternately admit and exhaustmotive fluid to'and from the opposite ends of the cylinder, which. the actuated valve controls it being understood that one cam 93 will control the admission of motive fluid to one end'of the cylinder,

and theexhaust from the other end ofithe cylinder, while' the cam 94 will control the reverse operatlon. In this particular case, the valve 93 controls the forward stroke of p the piston in the cylinder, while the valve 94 controls the returnstroke.

The shaft 95 extends into a casing 10l fixed to the base l 'and having mounted therein a series (in this case six) of lugs 1 102, each lug carrying a pair of contacts es sec 1'03 insulated from the casing. A contact 104, of flexible material, is mounted onan arm 105 fixed to the shaft, and is arranged to close pairs of contacts during therotation of this arm with the shaft. 'Stiitable" electrical conductors are connected with the con tacts, and issue from the casing 101 through the outlet 120.

' The electrical connections are shown in Fig. 13. As shown in this figure,- one contact 103 of each "set is connected to a common terminal, which is connected with one of the terminals of the electro-magnet 100,

l the otherterminal ofthe electro-magnet being connected with a double pole switch106 receiving current from any s'uitablesource of supply 107. The other terminal ofthe double pole switch is connected by a series of connections with the other contacts of each set, and these connections will now be described in detail. It will be noted,first,-;thatjthe contacts 103 are inclined inwardly: in the direction of rotation of the arm 105, so that the contact 104 will be under tension, and, as it leaves, one pair of contacts will snapinto engagement with the succeeding pair of contacts. Referring to Figs. 13 and 14, one of each set of contacts 103 is connected in circuit with the relay, the series of relays corresponding to the contacts being indicated by SM, F, ST, MFT, St, StR. Connected in circuit with certainof these relays are-sets of contacts 108, each set being yieldingly mounted on a' block 109'and adapted to'be closed by pins orprojections 110 on certain of the piston rods, so that the piston rods will operate to close the contacts. Thus, the

pair of contacts connected in circuit with the relay Fare adapted to be closed by the mandrel piston rod upon its forward movement; the contacts connected in circuit with i the relay ST are adapted to be closed'upon the forward stroke of thejformer piston; the contacts connected in circuit with the relay MFT are adapted'to be closed upon the forward stroke of the'tool piston rod; the contacts connected'in circuit with the relay St are adaptedto be closed upon the return movement of the former piston rod; and the contacts connected in circuit with the relay StR are adapted to be closed upon forward movement of the stripper piston rod. The circuit through the electro-magnet 100, the contacts 103, the-different'relays, and the different contacts 108 are completed by a main 111 connected to the right.

terminal of the-switch 106. A- switch 112 is adapted to close the circuit through the first relay SM, 'so as to connect the same directly with the main 111, and this switch 112 may be spring actuated so asto be normally open Each relay has air-armature 113'electrically connected with the relay terminal and adapted, when attractedby the relay, rto engage a1-=contacti 114,r.a series-bf these contacts 114being connected vwith a branch 115 oonnected to the main'111.l The diagram, Fig. 1'5,"the parts will beqin-the positions shown in the drawings, that is,

with the mandrel contracted, the spotter, former, stripper and the tool retracted, and with the brush 104. bridging the, contacts 103.. If the switch" 112 is now closed, the circuit will becompleted through the clutch electro-magnet the contacts 103-,'the brush 104, the relay M, and the main 111. This connection will preliminarily .be: through. the switch 112, but, immediately thereafter,

cuit will remainclosed until the brush 104 leaves-the spotter and mandrel contacts 103', at which time, also, the :co'ntacts' 113,114 of e the relayfSM are separated; The operator can, therefore, after closing the switch 112,

again release or even open the same. "Dur ing the movementof the'brush- 104 and the shaft95, the valves 87 will be operated to admit motive fluid to the mandrel and spo tter'cylinders, so as to cause the mandrel to expand and the spotter to clamp thesheet against the under face of themandrel. Rotation of the shaft will-continue until the brush 104 leaves the spotter and mandrel contacts 103, at which time the circuit will through the contacts 113, 114, and this cire" be broken and'the shaft 95' will stop, unless the contacts 108 in circuit'with the former relay F have been closed bythe'mandrel piston,gin which latter case the: circuit, is

completed through the'contacts 108'with'the snapped into engagement withr'a'nd zclosed the-former contacts 103.: The shaft 95 will nowbe rotatedto admitmotive fluid to the former cylinder so as to cause'tlieformers to wrap the sheet around the? mandrel :Itwill, therefore, be seen 'that 'it 'is insured that theformer will not be started untilthe man drel has been fully expanded. After the contacts 108 have once been closed, the-bir- 'cuit is completed directly throu h the arma ture ofthe relay F to .thecorresponding' contact 114, so that the circuit T will remain closed until'the brush 104; leaves theformer contacts -andsnaps into "engagement with the succeeding, pair of contacts 103. When the brush 104 connects the? succeeding' pair of contacts 103, the-circuit will beopen unmainlll, as brush 104 has, by this time, 1

less the former has closed the contacts 108 in circuit with the relay ST, inwhich latter case the circuit is completed and theshaft 95 is rotated to admit motive fluid tothe spotter and toolcylinders to cause the spotter to returnand the tool to move forward. Upon the succeeding movement of the relay MF T is connected in circuit, provided the contacts 108 have been closed by the tool piston rod upon its forward movement, and duringthe movementof theshaft 95, the mandrel is contracted, the former withdrawn, and the tool also retracted. The circuit is now closed throughthestripper c0ntacts103 andthe relayfiSt, provided the contacts 108in that circuit have been closed by the returnof: the former. lDuringth-e succeeding movement ofthe shaft .95, motive fluid is admitted to the stripper cylin= der to move the stripper forward to eject the keg body from the mandrel. Upon the completion of the forward movement of the stripper, the contacts 108 are closed to close the circuit of the relay StR, whereupon the shaft 95 will continuein its movement to causethe return of the stripper. Asithe brush 104 now' leaves the stripper return contacts 103, and if the switch 112 is, at this time, open, the circuit will be broken and the shaft '95 "will stop, causinglthe entire machine to come to rest at the completion of the cycle of operations. If the switch 112 is now again closed, the machine will perform another: cycle of operations.

It will, therefore, be seen that, in accordance withthis invention, it is insured that each operation will be completed before the succeeding operation will start. a This insures the performance of. the separate functions of the mechanism in accordance with a predetermined cycle of operations. this controlling mechanism it is possible to use a separate motor for each mechanism, and, therefore, permit the useoffiuid pressure operated means for o erating the separate elements of the comp ete mechanism.

In accordance with this invention, the

"sheet is first pressedcpositively against; the

bottom of themandrel by the spotters, and the formers then operate to fold .thesheet aroundth'e mandrel The provisionofthe chains 43, which form a flexible backing for the sheet and which are movable withthe sheet around the mandrel,together with, the movement oftheja'ws on account of their peculiar mounting, causes the sheetitowbe tightly wrapped around the mandrel from its center toward'its ends, so as to cause the sheet to firmly engage thecmandrel surface at all points. The keg can, therefore, be

madeto conform closely to the mandrel, and to a given size. With this constructionit is possible toform a butt weld, since the ends of the sheet will-move toward each other until their endsengage, and then thelinkage With pro'aches the ends of the sheet.

is shown as. provided with a leaf spring 138 anchored at;its end on said. link, and pro:

vided, atits free endwith an .adjustable screw139, adapted toengage a face 14,0011

the arm 37. By a proper adjustment of the screw 138, this screw is made to engage the face 1l0-dur1ng the latter part of the movement of the arm 37, so as to retard the mechanism on that side durinmthe latter part of its movement. This Wlll cause the retarded'jaw 15 to lag behind the unretarded jaw, so that the right edge of the sheet S, Fig. 17 ,will beplaced on the mandrel before the left edge of the sheet comes down on the mandrel,,thereby; causing, the left edge to lap over the right ,edge and form a lap joint. 1 The machine can, ,.therefore, be readily: 'convertcd'into one which forms a lap joint. j y p In the welding vof a seam,;theconduction of the heat to the sheet is necessarily greater when midway of .the; sheet,: oraway from its ends, than at theiends of the sheet. This is because, in the former case, the conduction is in alldirections, while, in the latter, it is through onl 1809. If, therefore, the relation of the f ame with respect to the seam is constant the sheet, while at .a-proper heat at its center, onaccount 0f themore rapid loss by radiation, is liable to burn at the ends of the seam on account ofthesmaller amountof radiation. In accordance with I this invention, therefore,: the relation of the flame with respect to the seam is controlled by the nature of the seam material adjacent the point impinged by the flame. This can be accomplished ,in a number of ways, one of Iwhich,las shown in Fig. 6, is by the throttling of the gas to reduce-the. flameas the welding tool approaches the ends of the sheet. In accordance with another method, the duration of the flame contact is controlled. and reduced as the flame app The first method is shown in Figs. 6 and 7, and has been briefly referred to. In accordance with this construction, by a proper construction ,of the cam groove 60, the welding temperature of the sheet can be maintained constant. By. adjustment of the slide 61, the machine can be 1 adapted t to different length kegs. This adjustment need, however, be only at ra ses one end, since thesheetcanalways'be placed on the mandrel so that the other end abuts against a gage 33 on the beam 26. Thecam groove 60 can be so formed that the gasis entirely shut ofl when the tool reaches its retracted position, a pilot flame being utilized to light the gas automatically.

Fig, 16 shows another embodiment of this invention. In accordance with this construction, the cross head 51 has "mounted thereon a bracket 152 which has an arm 153 extending along the tool guide and the cylinder, and which may be supportedby a bracket guide 125 on the flange of; the cylinder54. The arm 153 has mounted thereon a pair of cams 126, which are adapted to be adjustably clamped thereon by hav-;

ing a slotted connection therewith. The pipe 84 is provided with a check valve which opens inwardly, but closes outwardly. Shunting the check valve is a pipe c rcuit 128 having a valve 129, the arm 130 ofwhich is connected with a link 131 guided in a bracket 132 moved downwardly by a spring 133 and having a cam roll 134 engaging the arm 153, With this construction, therefore, the inlet of the motive fluid to the rlght end of the cylinder 54 is unimpeded, beingdirectly through the pipe 84 pastthe check valve 127, while the exhaust of the motive fluid from that end of the cylinder must be through the branch 128,, as the check valve.

closes the'Ipa-ssage directly through'the pipe 84. When the valve 129 is fully open, as

shown indotted position, Fig. 16, the flow of motive fluid through the branch 12.8.1snnimpeded, and the tool, will, at that time,

move at its maximum rate: when; however, the valve 129 is partially closed, as shownin full lines, then the passage through the branch 128 is throttled and the tool will, at

that time, move at its minimum rate. d

I As the toollreciprocates back andforth, the cam roll 134 is moved from full line position to dotted position to open and par tially closecthe valve 129.: the ,toolipro- V ceeds on its initial forward movement, with the cam roll 134engaging the right cam 12h, themovement of the tool will be at a maximum rate; as soon, however, as the cam roll 134 leavesjthe cam 1 26, the movement. of

the tool willbe at aminimum rate, 'The 'cams 126 are so placed as to result in a move- 'ment of the tool at the maximum rate'as- 55" the toolstarts and leaves the ends ofhthe sheet, ;but to resultin the movement of "the tool being aminimum after it is once fully on the-sheet. The tool will, therefore, move rapidly on and rapidlyoff of the sheet, but

when fully on the sheet, will move at a nniformslow rate, By .the proper proportion of the cams 126 the heatlng-eifect on the seam can be .made abso lutely uniform. 1 As ,there is no throttling of pipe 82, and, therefore, no back pressure to the returnmovethis invention is-not to be limited tothe specific constructionshown and described.

Havingthus described the invention, wha t isclaimed is: r 7

-1. In a machine of the class described,;the combination with a mandrel, of formers .c'ooperating therewith, and :means for actuating said formers, adapted to ,permitsaid formers toadjust themselvestosaidmandrel and the sheet to be formed, said formers operatlng to wrap a sheet aroundsaid mandrel to position the edges thereof in abut-.

tingrelation andtohold thesheet edges so positioned, on the mandrel and press the same together to form a buttjoint. I

- 2. Ina machine of the classdescribedgthe combination with a mandrehof formers co,- operating therewith, and means for actuating said formers, adapted to wrap a sheet around said mandrel and position the edges thereof in abutting relation, and means for ;su ortin said formers to ermit the same .-to adjust themselves to thewrappedssheet,

.adaptedeto cause said formers to hold the .sheet edges so positioned on the mandrel, and press thesametogether to form abutt joint.

3. In a machineof the class described, the

combination with a mandrel, 10f formers co operating therewlth, and means for actuatng -said formers, adapted .to -wra'p a sheet around said mandrel and position the-edges thereof in abutting relation, and flexible" means for supporting said formers, adapted to cause sa1dformers to engagefthesheet edges so positioned to forma-butt joint. 7 4. In-a' machine of the'class described, the

combination with a, mandrel, of formersfcooperating therewith, flexible means connecting sa1d formersadapted {toform a support for-a sheet, and means for factua'tlng said formers, adapted towrap the sheet around i saidmandrel' and position the edges thereof in abutting (relation, said formers operating 11 -to-.-engage the sheet edges sogpositioned to 'forma buttjoint: v. p j ,U 5. Ina machine of the: class described, the combination with a,mandrel, v :of formers co [OPQI'ZLiJiIl therewith, flexible means connecting said formers adapted to form a support for a she'et, vand means for actuating said H formers, adapted towrap the sheet around said mandreland positionthe edges thereof in'abutting relation, and flexiblemeans for supporting saidformers, adapted ,to cause a said formers to engage the sheetedges so 7 positioned to form a butt joint.

- f 6. In a machine of the class described, the combination withfa mandrel, o'f formers 00- operating therewith to wrap asheetaround said 'mandrel, and a flexible backing connected with said formers, and" adapted to move with the sheet around said mandrel.

7; In a machineof the class described, the combination with a mandrel, of formers cooperatingtherewith to wrap a sheet around said mandrel,a support adjacent said mandrel, and flexiblebackings' connecting said 9. In a machine of the classdescribed, the

combination with a mandrel, of means for clamping a sheet intermediate its ends against said mandrel, formers adapted to wrap the clamped sheet around said mandrel, and a flexible backing connected with said formers, adapted to move withthe sheet around said mandrel.

10.In a machine of the class described, the combination with amandrel, of means for clamping a sheet intermediateits'ends against said mandrel, formers adapted to wrap theclamped sheet around said mandrel, and a flexible baokingsupported inter mediate its ends and connected at its ends with the with said formers, adaptedto move sheet around said mandrel. e e V 11, Ina machine of the class described, the combination with a mandrel, of formers cooperating therewith to wrap a sheet around said mandrel, adapted to posltlon the edges thereof in abutting relation, and

a flexible backing connected with said formersiand adapted to move with the sheet around said mandrel, said formers operating to engage the sheet edges so positioned to form a butt joint. f

12. In a machine of the class described,

the combination with a mandrel, of means forclamping a sheet intermediate its ends against said'mandrel, formers adapted to wrapthe clampedsheet around" said mandrel, adapted to position the edges thereof its ; joint.

in abutting relation, and ayflexible backing connected with said formers, adapted to move withthe sheet around said mandrel and engage the sheet edges to form a butt 13. In a machine of the class described, the combination with a mandrel, of formers cooperating therewith, carriersformovably supportlng smdformers, means connectlng the free mandrel-engaging ends 0f S3,1d

formers, and means for actuating said formers. y

cooperating therewith, carriers for movably supporting said formers, flexible means for connecting the mandrel-engaging ends ofi said formers, and means formers. i r e 15. In a machine of the class described, the combination with a mandrel, of form ers cooperating therewith, carriers form'ow ably supporting said formers intermediate their ends, means connecting the mandrelengaging. ends of said formers,"and actuat ing means connected to the other ends of said formers. a 1 9 a 16. In "a machine of the class described, the combination with a mandrel, of formers for actuating said cooperating therewith, carriers for movably supporting said formers intermediate their ends, means for flexibly connecting the mandrel engagingends of said formers, and actuating meansconnected to the other ends of said formers.

17'. In a machine of theclass described, the combination with a mandrel, of formers cooperating therewith, pivotally mounted intersecting arms adapted to pivotally support said formers intermediate their ends, means connecting the mandrel-engaging ends of saidlformers', and actuating means connected to the other ends of said formers.

18. Ina machine oftheclass described,

the combination witha mandrel, of formers cooperating therewith, carriers for movably supporting said formers, a flexiblegbacking connecting the mandrel-engaging ends of said formers, and means for actuatingsaid formers. 7 Y

'19, In a machine of the class described,

the-combination with a mandrel, of formers cooperating therewith, pivotally mounted I intersecting arms adapted to pivotally supportsaid'formers intermediatetheir ends, a flexible backing connecting the mandrel-engaging ends of said formers, and actuating means connected tothe other ends of said 'formers. i

20. Ina machine of the class described, the combination with a mandrel, of means for forming a sheet around said mandrel adapted to join the edges ofsaid sheet, a

welding tool, and means foricmoving said tool back and forthfalong the joined edges,

adapted to weld the same together.

21; In a machine of the class described,

the combination with a mandrel, of means 'for forming a sheetaround said mandrel adapted to join the edges of saidsheetya w'eldnig tool, and 'means'for' moving said toolalong said mandrel and the joined edges of the sheet thereon, adapted to weld the joint. V

22. Ina machine of'the-class described,

thecombination with a frame and a mandrel a thereon, of formers adapted to wrap a sheet 14,111 a machine of the. class described, thecombination witha mandrel, of formers around said mandrel and join the edges ment on said frame, and means for moving said tool along said mandrel and the joined edges of the sheet thereon, adapted to weld the joint.

23. In a machine of the class described, the combination with a frame and a mandrel thereon, of formers adapted to wrap a sheet around said mandrel, a welding tool mounted for movement on said frame, and means for actuating said formers and said tool in cooperative relation, adapted to join the edges of the sheet and then move said tool along the joined edges while the sheet is held by said forming means.

24. In a machine of the class described, the combination with a frame and a mandrel thereon, of formers adapted to wrap a sheet around said mandrel, a welding tool mounted for movement on said frame, and means for actuating said formers and said tool in cooperative relation, adapted to engage the edges of the sheet to form a butt joint and then move said tool along the joint while the sheet is held by said forming means.

25. In a machine of the class described, the combination with a mandrel, of formers cooperating therewith, means for actuating said formers, adapted to wrap a sheet around said mandrel, and position the edges thereof in abutting relation, said formers operating to engage the sheet edges so positioned to form a butt jont, a welding tool, and means for moving said tool along the joint while the sheet is held by said forming means.

In testimony whereof we have hereunto aflixed our signatures.

FLOYD S. YOUTSEY. EDWARD C. WALKER.

ASHELEIGH S. MOSES. 

